Researchers warn blood pressure advice fixates on salt while underplaying potassium

Naomi Fukagawa, professor of medicine emerita at the University of Vermont’s Robert Larner, M.D. College of Medicine, and five co-authors want public guidance on high blood pressure to give potassium the same weight it gives salt. Their review, which drew a fresh round of coverage this week, says sodium intake generally runs above recommendations while potassium intake sits far below optimal levels in rich and poor countries alike. Hypertension affects more than 1.28 billion adults worldwide.

Tech news in one quick read: Get the most interesting stories in startups, tech and programming, each with a short TLDR, in one daily email from TLDR.

Subscribe to TLDR →

We may earn a commission if you sign up.

The authors do not call for dropping the salt message. They argue it is incomplete, and that the half of the sodium-potassium pair that gets less airtime may be the easier one for many people to act on.

A review in the American Journal of Clinical Nutrition

The paper, titled “Rethinking the impact of dietary sodium and potassium on blood pressure to advance public health,” appears in The American Journal of Clinical Nutrition (2026; volume 124, issue 2, article 101396). Besides Fukagawa, the author list names Paul Welling, Janice Johnson, Kristin Reimers, Soo-Yeun Lee and Patricia Zecca. The work was supported by the IAFNS Sodium in Food and Health Implications Committee, a funding disclosure the ScienceDaily write-up of the release reproduces, and readers weighing the conclusions should keep it in view alongside the authors’ own framing.

Fukagawa summarized the case in one sentence: “Growing evidence shows that increasing dietary potassium as well as reducing sodium intake work together to better manage hypertension.” The University of Vermont’s medical communications office had already flagged the report in July, when its Larner College news page pointed to coverage of the same argument under the idea that boosting potassium belongs in efforts to control high blood pressure.

The timeline is longer than a single news cycle. The Vermont page is dated July 30, 2026, and lists ScienceDaily, Medical News Today, VeryWell Health and Today’s Dietitian among outlets that had already picked up the report, so the November 2 release is a second wave of attention to a paper that first circulated in the summer. The release itself is a summary, and it leaves gaps a reader should know about. It gives no blood pressure reduction values, no recommended daily potassium amount and no data from a new trial, which means the review’s weight rests on the authors’ reading of existing evidence and on the full text in the journal.

Why sodium reduction stays foundational

The authors keep the salt advice. In their words, dietary sodium reduction is a foundational strategy for hypertension prevention and management, and what they ask for is equal emphasis on increasing potassium intake. That wording matters for how the findings should be read: the complaint is about proportion in public messaging, and the review does not claim that salt guidance has been wrong.

The salt baseline is well established. The World Health Organization’s salt reduction fact sheet sets the adult limit at under 2,000 mg of sodium a day, which is under 5 g of salt, about a teaspoon, and suggests that people who use table salt consider lower-sodium substitutes containing potassium. Its separate hypertension fact sheet counts about 1.4 billion adults aged 30 to 79 with the condition in 2024 and notes that roughly 600 million of them, 44 percent, do not know they have it. The 1.28 billion figure in the Vermont-led review and the WHO’s 1.4 billion rest on different age bands and years.

Bananas, beans and the salt-substitute problem

On the potassium side, the authors point to everyday foods: fruits, vegetables, legumes and dairy, with bananas, potatoes, beans, leafy greens and yogurt named as examples. Because most people eat too little of them, the paper treats food-first potassium as the default route, not a supplement habit. The second route is reformulating salt itself. The review supports partially replacing sodium chloride in table salt and processed food with potassium salts, though it flags a manufacturing obstacle: too much potassium salt adds a metallic taste, so food makers have to balance flavor against the health gain. Replacement is partial for that reason.

There is also a safety boundary. People with kidney disease, and people taking certain medications, are told to use potassium supplements and potassium-based salt substitutes only with medical guidance, because impaired kidneys clear potassium poorly. A blanket public message to eat more potassium would need that exception written into it.

The practical message the authors want to carry is a pairing. Cutting sodium and adding potassium are presented as two actions that work together, so a person told only to avoid salty food gets half of the instruction. The review’s foods are ordinary ones, which keeps the advice inexpensive compared with a drug, though the release does not put a price or a number on the effect.

What remains unsettled is the policy step. The authors call for further research and updated public health policies, but the release names no revised intake target and no timetable, so how national guidelines will change, if they do, is still an open question for the agencies that write them, and whether any of them adopts the authors’ call for equal emphasis will be visible only in the next round of published guidance.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

Tech news in one quick read: Subscribe to TLDR →

We may earn a commission if you sign up.